Head-to-head · Best Water Leak Detectors

Aqara Water Leak Sensor vs Shelly Flood Gen4

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Aqara Water Leak Sensor comes out ahead by a clear margin (4.0 vs 3.4). Aqara Water Leak Sensor is best for: users wanting durable, long-lasting leak detection. Read the strengths below before deciding.

Higher ratedRanked #4 in Best Water Leak Detectors

Aqara Water Leak Sensor

4.0

3 sourcesall derived$17.99as of Oct 20

The Aqara Water leak sensor delivers excellent detection performance as demonstrated in testing with both slow trickles and fast flowing water, according to AppleHome Authority. The device features an IP67 rating for waterproofing and dustproofing, making it suitable for humid environments. It measures just 50 × 50 × 15 mm, allowing for tight placement, and uses a CR2032 battery that Aqara claims will last up to two years. However, it requires an Aqara hub for operation, which adds cost and complexity, and its HomeKit integration is limited to basic alert display without advanced automation capabilities.

Strengths

— Excellent leak detection performance tested with both slow trickles and fast flowing water
— IP67 waterproof and dustproof rating suitable for humid and dusty environments
— Compact design measuring 50 × 50 × 15 mm allowing placement in tight locations

Watch-outs

— Requires Aqara hub for operation, which is additional cost and setup requirement
— Limited functionality when used with HomeKit - only displays alerts without additional automation

$17.99 · Check Price on Amazon Full review →

Ranked #6 in Best Water Leak Detectors

Shelly Flood Gen4

3.4

3 sources$39.99as of Oct 20

The Shelly Flood Gen4 is a smart water leak sensor designed for early detection of water leaks, sending real-time alerts to your phone and triggering a built-in alarm. It supports multiple protocols including Wi-Fi, Zigbee, Matter, and Bluetooth, and integrates with major smart home platforms like Alexa, Google Home, and Apple HomeKit. YouTube reviewer TecTimmy noted its effectiveness for early flood detection in coastal areas, while PCMag praised its expandable coverage capabilities. It's best suited for users seeking a budget-friendly, expandable leak detection solution, though it requires a smart home network for full functionality.

Strengths

— Detects water leaks in real-time and sends alerts to your phone
— Built-in alarm for immediate local notification of leaks
— Supports multiple smart home protocols including Wi-Fi, Zigbee, Matter, and Bluetooth

Watch-outs

— Requires Wi-Fi or Zigbee network for full functionality

$39.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Aqara Water Leak Sensor

The Aqara Water Leak Sensor shares an IP67 rating with the SwitchBot Wi-Fi Leak Detector, above the IP65 of the Eufy Water and Freeze Sensor and the IP44 of the Shelly Flood Gen4. Like the Eufy it needs its maker's hub, where the SwitchBot connects over 2.4GHz Wi-Fi. Its CR2032 battery is estimated to last up to two years, the same figure the SwitchBot gives for two AAA batteries.

Shelly Flood Gen4

The Shelly Flood Gen4 supports Wi-Fi, Zigbee, Matter and Bluetooth, where the First Alert L1 Wi-Fi Water Leak and Freeze Detector lists Wi-Fi and the Aqara Water Leak Sensor lists Zigbee. It has a built-in alarm, which the First Alert L1's entry says that model lacks, and its sensor cable can be extended up to 150m from the 2m supplied. Its IP44 rating is lower than the IP67 of the Aqara and the SwitchBot Wi-Fi Leak Detector.

Specs side-by-side

Spec	Aqara Water Leak Sensor	Shelly Flood Gen4
Detection Method	contact with water	When water touches a sensor
Connectivity	Zigbee	Wi-Fi, Zigbee, Matter, Bluetooth
Power Source	CR2032	Battery powered (battery included)
Alarm Type	App + hub alarm	Real-time phone alerts and built-in alarm
Water Resistance	IP67	IP44
Dimensions	50 × 50 × 15 mm	97x76x25 mm
Sensor Type	Water leak detector	Water leak detection
Material	anti-UV material	Plastic

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